Compromised Controller Design for Current Sharing and Voltage Regulation in DC Microgrid

Han, Renke; Wang, Haojie; Jin, Zheming; Meng, Lexuan; Guerrero, Josep M.

doi:10.1109/tpel.2018.2878084

Cited by 59 publications

(40 citation statements)

References 40 publications

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“…3,i fulfilling the inequalities in (21). Note that these inequalities are always feasible, implying that a stabilizing controller always exists.…”

Section: K N ) Considering Also the Collective Lyapunov Functionmentioning

confidence: 99%

“…Proposition 4. If gains K i are chosen according to (21), and the CIL R i and CPL P CP Li in the ZIP load for each MG verify…”

Section: K N ) Considering Also the Collective Lyapunov Functionmentioning

confidence: 99%

“…Theorem 1. If Assumption 1 is fulfilled, the graph G el is connected, ZIP loads satisfy (27), and control coefficients are chosen according to (21), then the origin of (8) is asymptotically stable.…”

Section: K N ) Considering Also the Collective Lyapunov Functionmentioning

confidence: 99%

“…While literature [18], [19] considered the problem of energy management operation between RESes and ESSes, the stability problem about MG with grid-forming/feeding converters and its clusters have always been ignored from system level. On the top of that, distributed secondary controllers, such as [10], [20], [21], mainly focus on the current sharing and balanced voltage regulation only among grid-supporting converters. The stability proof and control parameters design are dependent on the system topology.…”

Section: Introductionmentioning

confidence: 99%

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Stability Analysis of Primary Plug-and-Play and Secondary Leader-Based Controllers for DC Microgrid Clusters

Han

Tucci

Martinelli

et al. 2019

IEEE Trans. Power Syst.

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In this paper, we propose a new hierarchical control scheme for Microgrid (MG) clusters, given by the interconnection of atomic dc MGs with ZIP loads, each composed by both gridforming and grid-feeding converters. In the primary level, we develop a new Plug-and-Play (PnP) voltage/current controller in order to achieve simultaneous voltage support and current feeding function with local references. The coefficients of each stabilizing controller are characterized by explicit inequalities, which are related only to local electrical parameters of the MG. Moreover, we provide a sufficient condition on the ZIP loads to guarantee passivity and asymptotic stability of electric system. The robustness of performance to system uncertainties is also demonstrated. In the secondary level, a leader-based voltage/current controller is proposed to achieve both voltage and current regulation for the MG cluster without specifying the individual setpoints for each MG. The proposed distributed controller requires a communication network where each regulator exchanges information with its communication neighbors only. With the proposed scheme, each MG can plug-in/out seamlessly, irrespectively of the power line parameters and models of other MGs. Closed-loop stability proof of MG clusters is formally proved independently of the cluster topology. Moreover, theoretical results are validated by extensive hardware-in-loop (HiL) tests showing robustness of the closed-loop cluster against perturbations in the loads, PnP operations and noises/delays in the communication network.

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“…3,i fulfilling the inequalities in (21). Note that these inequalities are always feasible, implying that a stabilizing controller always exists.…”

Section: K N ) Considering Also the Collective Lyapunov Functionmentioning

confidence: 99%

“…Proposition 4. If gains K i are chosen according to (21), and the CIL R i and CPL P CP Li in the ZIP load for each MG verify…”

Section: K N ) Considering Also the Collective Lyapunov Functionmentioning

confidence: 99%

Section: K N ) Considering Also the Collective Lyapunov Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Stability Analysis of Primary Plug-and-Play and Secondary Leader-Based Controllers for DC Microgrid Clusters

Han

Tucci

Martinelli

et al. 2019

IEEE Trans. Power Syst.

Self Cite

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show abstract

“…The power electronic converter can improve not only the renewable energy usage ratio but also the power grid quality performance [4]. As a result, the power electronic converter, acting as interface equipment between distributed energy resources (DERs) and loads, is the main part of the AC/DC microgrid, and allows the elasticity of the islanded operation and the grid-connected operation [5,6]. Nevertheless, several power-sharing and limitation of frequency as well as voltage issues need to be investigated.…”

Section: Introductionmentioning

confidence: 99%

Exponential-function-based droop control for islanded microgrids

Wang

Sun

Gui

et al. 2019

J. Mod. Power Syst. Clean Energy

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An exponential-function-based droop control strategy for the distributed energy resources (DERs) is proposed to reduce the reactive power-sharing deviation, limit the minimum value of frequency/voltage, whilst improving the utilization rate of renewable energy. Both DERs and loads are interconnected to achieve a power exchange by converters, where the power management system should accurately share the active/reactive power demand. However, the proportional reactive power sharing often deteriorates due to its dependence on the line impedances. Thus, an exponential-function-based droop control is proposed to À prevent voltage and frequency from falling to the lower restraint,`achieve accurate reactive power sharing,´eliminate communication and improve the usage ratio of renewable energy. Furthermore, its stability is analyzed, and the application in islanded AC/DC hybrid microgrids is investigated to achieve the bidirectional power flow. The simulation and experimental results show that the reactive power sharing deviation can be reduced, and the utilization rate of renewable energy is improved by using the proposed method. Moreover, the simulation results illustrate that the system can maintain stable operation when the microgrid is switched from one supplied energy operation condition to another absorbed one.

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Fuzzy PID Controller for Accurate Power Sharing in DC Microgrid

Nguyen

Lee

2019

Lecture Notes in Computer Science

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Compromised Controller Design for Current Sharing and Voltage Regulation in DC Microgrid

Abstract: He will join in Energy and Power Group, Oxford University, UK, as a postdoctoral researcher in November 2018. His research interests include multi-port converter design, distributed controller for AC and DC microgrid. He received an outstanding presentation

Cited by 59 publications

References 40 publications

Stability Analysis of Primary Plug-and-Play and Secondary Leader-Based Controllers for DC Microgrid Clusters

Stability Analysis of Primary Plug-and-Play and Secondary Leader-Based Controllers for DC Microgrid Clusters

Exponential-function-based droop control for islanded microgrids

Fuzzy PID Controller for Accurate Power Sharing in DC Microgrid

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